Portable scaffold-chair.



No. 763,284. I PATENTED JUNE 21, 1904.

M. HEIKB. PORTABLE SCAPFOLD CHAIR.

l APPLIOATION rum) MAR. 2, 1903. NOMODEL.

UNITED STATES Patented June 21, 1904.

PATENT ()FFICE.

MAX HEIKE, OF MELROSE PARK, ILLINOIS.

SPECIFICATION formingpart of Letters Patent No. 763,284., dated June 21,1904.

Application filed March 2, 1903. Serial No. 145,813. (No model.)

To (all whom, it may concern.-

Be it known that I, MAX HEIKE, a citizen of the United States ofAmerica, and a resident of lWIelrose Park, in the county of Cook andState of Illinois, have invented certain new and useful Improvements inPortable Scaffold- Chairs, of which the following is a specification.

The main objects of my invention are to provide an improvedscaffold-chair and supports therefor particularly adapted for use bypainters in working along the walls of a building, to suitably arrangethe device to be shifted from side to side and to be raised and loweredby mechanism located conveniently to the operator on the chair, and toprovide a convenient management of self-locking mechanism for raisingand lowering the chair. I accomplish these objects by the device shownin the accompanying drawings, in which Figure 1 is a front elevation ofa device constructed according to my invention. Fig. 2 is a sideelevation of same.

The rail or track 1 is suspended from members 2, each having therein anaperture 3, through which the device may be suitably suspended fromhooks engaging the cornice of a building. The rail is constructed of twoangle-irons, each having a flange 4 for supporting one of the wheels 5.The wheels 5 are journaled in a hanger 6, which has suspended therefroma sheave 7. The hanger 6 also has journaled thereon a sheave 8, which isrigid on the shaft of one of the wheels 5 and which supports an endlessrope 9. The frame 10 of the chair is suspended from the sheave 7 bymeans of the rope 11, which has one end secured to the yoke 21, formingpart of the frame 10, and which passes through the fairleader 22 and hasits opposite end wound upon the drum 12. The fair-leader 22 islongitudinally slidable on bar 23. The drum is rigidly mounted on theshaft 13, which is journaled on the lower part of the frame 10. Saidshaft 13 has rigidly mounted thereon a wormwhecl 14, in mesh with theworm 15, which is journaled in the frame and provided with acrank-handle 16. A seat or working platform 17 is secured to the frame10 and has a pair of projecting arms 18, braced at 19, and each providedwith a suitable roller 20, which is intended for bearing against thewall along which said device is suspended.

The operation of the device shown is as follows: The rail 1 will besuitably suspended suitable hooks secured to the members 2. The chairmay be moved from side to side along the rail 1 by turning the sheave 8by means of the endless rope 9. The operator may readily raise and lowerthe chair by turning the crank 16, so as to either wind or unwind therope 11 on the drum 12. The worm-gear is self-locking, and it istherefore impossible to accidentally release the drum and allow thedevice to fall. The form of yoke 21 shown permits the device to hang inequilibrium from a single rope and leaves open the side of the framewhich is toward the building. It will be seen that the form of my hanger6 with its wheels 5 will permit the device to run along a rail which iscurved to extend around the corner of a building.

I am aware that the broad feature of suspending a scaffold from a railsecured along the side of a building has been used heretofore and amalso aware that such scaffolds have been arranged so as to be raised andlowered by an operator on the scaffold, and I therefore do not broadlyclaim such features.

What I claim as my invention, and desire to secure by Letters Patent,is-

In combination with the supporting means, a chair comprising a metallicopen frame, a seat 17 secured to the frame, a pair ofoutwardly-projecting arms carried by said seat, braces for said arms,and aroller journaled in the outer ends of said arms.

Signed at Chicago this 26th day of February, 1903.

MAX HEIKE. Witnesses:

RUDow RUMMLER, WM. R. RUMMLER.

55 from the cornice of a building by means of

